update erd db and add display name to user access table

backend/apps/accounts/serializers.py

@@ -15,8 +15,8 @@ class PkAsIdMixin(serializers.Serializer):
 class UserSerializer(PkAsIdMixin, serializers.ModelSerializer):
     class Meta:
         model = User
-        fields = ["id", "user_name", "status", "created_at", "updated_at"]
-        read_only_fields = ["id", "created_at", "updated_at"]
+        fields = ["id", "user_name", "display_name", "status", "created_at", "updated_at"]
+        read_only_fields = ["id", "user_name", "created_at", "updated_at"]
 
 
 class LoginSerializer(serializers.Serializer):